A new condenser for use in a commercial cabinet

Abstract

The utility model relates to condenser technical field, and disclose a novel condenser for commercial cabinet, include: shell, the shell has multiple fins in array, multiple U shape long -tubing is inclined type equidistance array setting on fin, the inner wall of U shape long -tubing is provided with multiple first internal gear rack that shows spiral distribution, between two first internal gear racks of adjacent setting has second internal gear rack, the gear rack height ratio of second internal gear rack and first internal gear rack is 1:2, U shape long -tubing is detachably connected with second elbow pipe through flaring, this commercial cabinet novel condenser passes through integrated type assembly adaptation compact space, fin and U shape long -tubing adopt high -strength aluminium material quality to reduce cost, pipe spiral internal gear rack / high -low composite internal gear rack structure, can strengthen turbulent effect, optimize flow state and reduce dirt corrosion, promote heat exchange efficiency and reduce system energy consumption, need not whole disassembly to realize the overhaul and replacement of single U shape long -tubing, reduced maintenance cost, adapts multi -working condition environment.

Description

Technical Field

[0001] This utility model relates to the field of condenser technology, specifically a novel condenser for use in commercial cabinets. Background Technology

[0002] Freezers need to continuously cope with high-load cooling demands, and traditional condensers have significant shortcomings. Most use copper fin structures, but copper is expensive and highly dependent on resources, leading to increased overall manufacturing costs and making it difficult to meet the cost control requirements of commercial scenarios. Some aluminum finned condensers have a straight tube design, resulting in a single refrigerant flow path, limited heat exchange area, and low heat exchange efficiency. This requires additional compressor power to maintain cooling performance, increasing energy consumption and potentially shortening equipment lifespan due to prolonged high-load operation.

[0003] The technical solution with publication number CN2757049Y discloses a refrigerator condenser with an internal thread. Using an internal thread condenser can shorten the length of the condenser without changing the condensation area, thus reducing costs. However, the internal thread heat exchange tube adopts an integrated welded connection. When the inside of the tube is partially damaged, the integrated tube is difficult to inspect and troubleshoot, and the entire tube needs to be replaced, resulting in high operating costs.

[0004] Therefore, we provide a new type of condenser for use in commercial cabinets to solve the above problems. Utility Model Content

[0005] (a) Technical problems to be solved To address the shortcomings of existing technologies, this utility model provides a novel condenser for commercial cabinets, which has the advantages of low cost, convenient inspection and maintenance, and high heat exchange efficiency, solving the problems of high cost and difficult inspection and maintenance of traditional condensers.

[0006] (II) Technical Solution To achieve the above objectives, this utility model provides the following technical solution: A new type of condenser for use in commercial cabinets includes: An outer casing, wherein multiple fins are arrayed within the outer casing; U-shaped long tubes, multiple U-shaped long tubes are arranged in an inclined, equally spaced array on the fins; The pipeline consists of multiple U-shaped long pipes connected in an S-shaped configuration via multiple first elbow pipes; The inner wall of the U-shaped tube is provided with a plurality of first internal toothed racks, which are arranged in a spiral pattern.

[0007] Preferably, the U-shaped tube and fins are made of high-strength aluminum alloy. Preferably, the first internal rack has 30 racks, and the bottom distance between two adjacent first internal racks is a value A, wherein the value A is 0.3 mm.

[0008] Preferably, the distance between two adjacent fins is 1.5 mm, the diameter of the U-shaped tube is L (8 mm), the U-shaped tube is coated with a corrosion-resistant coating, and the wall thickness of the U-shaped tube is C (0.61 mm).

[0009] Preferably, the rack height of the first internal rack is a value B, wherein the value B is 0.4 mm, and the angle between two adjacent sidewalls of the first internal rack is 20°.

[0010] Preferably, a second internal rack is provided between two adjacent first internal racks of the U-shaped long tube, and the ratio of the rack height of the second internal rack to the rack height of the first internal rack is 1:2.

[0011] Preferably, the U-shaped long tube is connected to a third elbow tube via a connector. The third elbow tube has two symmetrically arranged slots at its end. An annular groove communicating with the slots is provided inside the third elbow tube. The connector has an I-shaped cross-section. One side of the lower ring plate of the connector has a first tooth groove and a second tooth groove that are slidably connected to the first internal rack and the second internal rack. The other side of the lower ring plate of the connector has a locking protrusion that is slidably connected to the annular groove. The connector has a T-shaped upper ring plate.

[0012] Preferably, a first groove and a second groove are formed between the upper ring plate and the lower ring plate, the pipe head of the U-shaped long pipe is slidably connected to the groove wall of the first groove, and the pipe head of the third elbow pipe is slidably connected to the groove wall of the second groove.

[0013] Preferably, both ends of the U-shaped tube are flared, and the inner wall of the flared portion is a smooth surface.

[0014] Preferably, the U-shaped long tube is detachably connected to a second elbow tube via a flared end. The second elbow tube is provided with a connector, and the connector is provided with an external thread on its periphery. The connector is connected to a connecting sleeve via the external thread.

[0015] Preferably, the connector is provided with an annular conical protrusion that slides with the inner ring wall of the flared opening, the annular conical protrusion and the outer edge of the connector form an annular groove, and the inner wall of the connector is provided as a thickened part.

[0016] Preferably, the connecting part of the connecting sleeve is provided with an internal thread that is threaded to the connecting head, the inner wall cross-section of the connecting sleeve is L-shaped, the connecting sleeve is provided with an annular inner conical wall that is slidably connected to the flared end, the connecting sleeve is provided with an annular inner wall that is slidably connected to the outer wall of the U-shaped long tube, and a step is formed between the annular inner conical wall and the connecting part.

[0017] Preferably, the inclined inner wall of the flared opening connects with the outer wall of the annular conical protrusion to form a first seal, the end of the flared opening abuts against the groove wall of the annular groove to form a second seal, the step of the connecting sleeve abuts against the groove end of the annular groove to form a third seal, the annular inner wall of the connecting sleeve and the outer wall of the U-shaped long tube to form a fourth seal, and the internal thread of the connecting part and the external thread of the connecting head to form a fifth seal.

[0018] Preferably, when the connector and the connecting sleeve connect the U-shaped long pipe and the second elbow pipe, the flared end, the annular conical protrusion, and the connecting part are all coated with epoxy resin.

[0019] (III) Beneficial Effects Compared with the prior art, this utility model provides a novel condenser for use in commercial cabinets, which has the following beneficial effects: 1. The new type of condenser used in this commercial cabinet expands the heat exchange area inside the tube by adopting a spiral internal rack or a high-low composite internal rack structure, extending the refrigerant flow path and enhancing the turbulence effect, reducing the thickness of the condensate film. The irregular surface of the high and low racks disrupts the smooth base of dirt deposition, and the scouring effect of fluid turbulence on the rack surface reduces impurity adhesion. Moreover, the tiny gaps formed by the high and low racks can avoid local dead water zones and reduce the accumulation of corrosive media. By optimizing the fin density and the U-shaped long tube inclined array design, a compact design is achieved to reduce space occupation without affecting heat dissipation efficiency. With the subdivision of the internal flow channel and the optimization of the flow pattern, the overall heat exchange efficiency is significantly improved compared with traditional straight tubes. The overall layout of this condenser is compact, occupies little space, and is conducive to the use of commercial refrigerators.

[0020] 2. The new type of condenser used in this commercial cabinet allows for quick and easy disassembly and assembly of the third elbow pipe connector and the U-shaped long pipe through the first and second toothed grooves on the connector. The integrated design of the T-shaped upper ring plate ensures that the first and second notches formed by the upper and lower ring plates completely surround the pipe ends of the U-shaped long pipe and the third elbow pipe, with the groove walls tightly fitting against the outer wall of the pipe end, forming the first physical barrier to prevent external impurities from entering the connection gap. On the other hand, the transverse wing plate of the T-shaped structure covers the entire connection end face, forming a pressure sealing effect at the interface between the notch and the pipe end. Combined with the fitting pressure of the inner wall of the notch, it effectively prevents leakage of the medium inside the pipe.

[0021] 3. The new type of condenser used in this commercial cabinet uses a five-level sealing structure combined with a threaded self-tightening design. The first seal, formed by the flared inner wall and the conical surface of the annular cone, blocks radial leakage of the internal medium. The second seal, formed by the flared end contacting the annular groove, intercepts axial penetration. The third seal, formed by the step of the connecting sleeve contacting the groove end of the annular groove, strengthens the end face seal. The fourth seal (the annular inner wall contacting the outer wall of the pipe) isolates external moisture intrusion. The fifth seal (the threaded meshing surface) fills the thread gap. The five-level seal provides double-sided sealing protection for the connection between the flared end and the connector, achieving convenient detachable connection between the U-shaped long pipe and the second elbow pipe while ensuring the sealing performance of the connection.

[0022] 3. The new type of condenser used in this commercial cabinet adopts a detachable connection structure, which can replace and repair individual U-shaped long tubes without the need for overall disassembly. This reduces the cost of local maintenance and capacity expansion, avoids the problem of replacing all pipes if one is damaged, and the integrated assembly design reduces assembly steps. It is suitable for the compact internal space of commercial cabinets, and the U-shaped long tubes with different specifications of racks at different stages can be flexibly replaced to make the condenser tubes adaptable to various working conditions and ensure the heat exchange effect of the condenser. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this utility model.

[0024] Figure 2 This is a side view of Embodiment 1 of the present utility model.

[0025] Figure 3 This is a schematic diagram of the condenser tube distribution in Embodiment 1 of this utility model.

[0026] Figure 4 This is a cross-sectional view of the U-shaped long tube of Embodiment 1 of this utility model.

[0027] Figure 5 This is a schematic diagram of the overall structure of Embodiment 2 of this utility model.

[0028] Figure 6 This is a schematic diagram of the condenser tube distribution in Embodiment 2 of this utility model.

[0029] Figure 7 This is a schematic diagram of the connection between the U-shaped long pipe and the second elbow pipe in Embodiment 2 of this utility model.

[0030] Figure 8 This is a schematic diagram showing the separation of the U-shaped long pipe and the second elbow pipe in Embodiment 2 of this utility model.

[0031] Figure 9 This is a cross-sectional view of the U-shaped long tube in Embodiment 2 of this utility model.

[0032] Figure 10This is a schematic diagram showing the distribution of the first and second internal spiral teeth of the U-shaped long tube in Embodiment 2 of this utility model.

[0033] Figure 11 This is a cross-sectional view of the connection between the U-shaped long pipe and the second elbow pipe in Embodiment 2 of this utility model.

[0034] Figure 12 for Figure 11 Enlarged view of point G in the middle.

[0035] Figure 13 This is a cross-sectional view of the connection between the U-shaped long pipe and the third elbow pipe in Embodiment 3 of this utility model.

[0036] Figure 14 This is a schematic diagram of the annular groove structure in the third elbow pipe of this utility model embodiment three.

[0037] In the picture: 1. Outer shell; 101. Fins; 2. U-shaped long tube; 201. First internal toothed rack; 202. Second internal toothed rack; 203. Flared end; 3. First elbow pipe; 4. Second elbow pipe; 401. Connector; 402. Annular conical protrusion; 403. Annular groove; 404. Thickened part; 5. Connecting sleeve; 501. Connecting part; 502. Annular inner conical wall; 503. Annular inner wall; 6. Connecting parts; 601. Upper ring plate; 602. Locking protrusion; 603. First toothed groove; 604. Second toothed groove; 7. Third elbow pipe; 701. Slot; 702. Annular groove. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0039] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0040] In addition, a fixed connection refers to a connection in which parts or components are fixed and there is no relative movement; a transmission connection refers to a connection in which mechanical motion or torque is transmitted to other working parts through a transmission component; a sliding connection refers to a connection in which two objects are in contact but not fixed and can slide relative to each other; and a rotational connection refers to a connection in which two objects are in contact but not fixed and can rotate relative to each other.

[0041] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0042] Example 1: This embodiment provides a novel condenser for use in commercial cabinets, which has the following technical features.

[0043] Please see Figures 1-4 A novel condenser for use in commercial cabinets includes a housing 1, with multiple fins 101 arrayed inside the housing 1; U-shaped long tubes 2, multiple U-shaped long tubes 2 are arranged in an inclined and equally spaced array on fins 101; Multiple U-shaped long pipes 2 are connected by multiple first elbow pipes 3 to form an S-shaped pipeline; The inner wall of the U-shaped long tube 2 is provided with a plurality of first internal toothed racks 201, which are spirally distributed.

[0044] The U-shaped tube 2 and the fins 101 are made of high-strength aluminum alloy, and the distance between two adjacent fins 101 is 1.5mm.

[0045] The first internal rack 201 has 30 racks, and the bottom distance between two adjacent first internal racks 201 is A, which is 0.3mm.

[0046] The diameter of the U-shaped long tube 2 is L, which is 8 mm. The U-shaped long tube 2 is coated with a corrosion-resistant coating. The wall thickness of the U-shaped long tube 2 is C, which is 0.61 mm.

[0047] The rack height of the first internal rack 201 is B, which is 0.4 mm, and the included angle between the sidewalls of two adjacent first internal racks 201 is 20°.

[0048] The novel condenser used in this embodiment of the commercial cabinet employs high-strength aluminum alloy to manufacture the fins 101 and U-shaped long tube 2, reducing costs while increasing the density of the fins 101 through precision stamping, thereby increasing the external heat dissipation area. The inner wall of the U-shaped long tube 2 is provided with a spiral first internal toothed rack 201, which extends the flow path of the refrigerant in the tube, enhances the turbulence effect, and improves the heat exchange efficiency inside the tube, significantly improving the heat exchange efficiency compared to traditional straight tubes. The outer shell 1 and fins 101 of this condenser are integrated and assembled. The U-shaped long tube 2 is inserted into the fins 101 and then welded to the first elbow tube 3, which is suitable for the compact internal space of the freezer, reduces assembly steps, and is combined with corrosion-resistant coating treatment to improve the condenser's anti-aging and sealing performance, extending its service life.

[0049] Example 2: See Figures 5 to 12 A second internal rack 202 is provided between two adjacent first internal racks 201 of the U-shaped long tube 2, and the ratio of the rack height of the second internal rack 202 to the rack height of the first internal rack 201 is 1:2.

[0050] It should be noted that the composite internal rack structure of the first internal rack 201 and the second internal rack 202 achieves a triple effect of enhanced heat transfer, optimized flow, and anti-fouling and anti-corrosion. Stepped heat transfer enhancement: The first internal rack 201 (high teeth) and the second internal rack 202 (low teeth) form a stepped inner surface. The high teeth expand the core heat exchange area, while the low teeth refine the flow channel segmentation. This allows the fluid to form secondary turbulence on the basis of the spiral flow guided by the high teeth, further reducing the thickness of the condensate film. At the same time, the low teeth can increase the number of vaporization cores, taking into account the efficiency optimization of both condensation and boiling heat transfer scenarios. Balance between flow resistance and residence time: The high teeth dominate the spiral flow, and the low teeth fill the gaps between the high teeth, avoiding the problem of local fluid short-circuiting caused by excessive tooth pitch in a single high-tooth structure. At the same time, the stepped tooth shape reduces the flow resistance of a single high tooth, reduces flow resistance and extends fluid residence time, and reduces the fan energy consumption of the condensation system.

[0051] The irregular surface of the high and low teeth disrupts the smooth base of dirt deposits, and the scouring effect of fluid turbulence on the tooth surface can reduce the adhesion of impurities; moreover, the tiny gaps formed by the high and low teeth can avoid local dead water zones and reduce the accumulation of corrosive media.

[0052] Both ends of the U-shaped tube 2 are formed with flared openings 203, and the inner wall of the flared opening 203 is a smooth surface; The U-shaped long pipe 2 is detachably connected to the second elbow pipe 4 through the flared end 203. The second elbow pipe 4 is provided with a connector 401. The connector 401 is provided with an external thread on its periphery. The connector 401 is connected to the connector sleeve 5 through the external thread. The connector 401 is provided with an annular conical protrusion 402 that slides with the inner annular wall of the flared opening 203. The annular conical protrusion 402 and the outer edge of the connector 401 form an annular groove 403. The inner wall of the connector 401 is provided with a thickened part 404. The connecting part 501 of the connecting sleeve 5 is provided with an internal thread that is threadedly connected to the connector 401. The inner wall cross section of the connecting sleeve 5 is L-shaped. The connecting sleeve 5 is provided with an annular inner conical wall 502 that is slidably connected to the flared opening 203, and the connecting sleeve 5 is provided with an annular inner wall 503 that is slidably connected to the outer wall of the U-shaped long tube 2. A step is formed between the annular inner conical wall 502 and the connecting part 501.

[0053] It should be noted that: the thickened part 404 of the connector 401 enhances its structural rigidity and prevents deformation during thread tightening; when the thread is tightened, the annular inner conical wall 502 of the connecting sleeve 5 generates radial pressure on the flared end 203, making the fit between the flared end 203 and the annular conical protrusion 402 tighter, forming a self-tightening sealing effect that tightens with pressure, further improving sealing reliability; the epoxy resin coating on the thread meshing surface increases the friction between the threads, which, together with the conical engagement of the annular conical protrusion 402 and the flared end 203, further improves the connection sealing performance between the flared end 203 and the connector 401; while the annular inner wall 503 of the connecting sleeve 5 fits against the outer wall of the U-shaped long tube 2, the flared end 203 restricts the axial displacement of the connecting sleeve 5, preventing the connector 401 from detaching from the U-shaped long tube 2.

[0054] The inclined inner wall of the flared opening 203 is connected to the outer wall of the annular conical protrusion 402 to form a first seal. The end of the flared opening 203 abuts against the groove wall of the annular groove 403 to form a second seal. The step of the connecting sleeve 5 abuts against the groove end of the annular groove 403 to form a third seal. The annular inner wall 503 of the connecting sleeve 5 and the outer wall of the U-shaped long tube 2 form a fourth seal. The internal thread of the connecting part 501 and the external thread of the connecting head 401 form a fifth seal. When the connector 401 connects the U-shaped long pipe 2 and the second elbow pipe 4 to the connecting sleeve 5, the flared end 203, the annular conical protrusion 402, and the connecting part 501 are all coated with epoxy resin.

[0055] It should be noted that: the first seal formed by the inclined inner wall of the flared end 203 and the conical surface of the annular conical protrusion 402 blocks radial leakage of the internal medium; the second seal formed by the end of the flared end 203 abutting against the annular groove 403 intercepts axial penetration; the third seal formed by the step of the connecting sleeve 5 abutting against the groove end of the annular groove 403 strengthens the end face seal; the fourth seal (the annular inner wall 503 abutting against the outer wall of the pipe) isolates external water vapor from intrusion; and the fifth seal (the threaded meshing surface) fills the thread gap. The five-level seal forms a double-sided, multi-layered sealing protection for the connection between the flared end 203 and the connecting head 401, achieving convenient detachable connection between the U-shaped long pipe 2 and the second elbow pipe 4 while ensuring the sealing performance of the connection.

[0056] The difference between this embodiment 2 and embodiment 1 is that the flared ends 203 at both ends of the U-shaped long tube 2 and the annular conical protrusion 402 of the second elbow tube 4 form a conical guide fit, which is locked by the thread of the connecting sleeve 5, making disassembly and assembly simple and convenient; it is convenient to replace a single U-shaped long tube 2 without disassembling the entire pipeline, which is suitable for partial maintenance or capacity expansion of the condenser; when the first inner rack 201, the second inner rack 202 or the pipeline of the U-shaped long tube 2 are damaged, they can be repaired separately by disassembling the connecting sleeve 5 and the second elbow tube 4, avoiding the situation of replacing the whole condenser tube when it is damaged in the traditional welded connection, reducing the use cost of equipment maintenance, and allowing for flexible replacement of U-shaped long tubes 2 with different rack specifications in the first stage, second stage and third stage, so that the condenser tube can be adapted to various working environments and ensure the heat exchange effect of the condenser.

[0057] In summary, the new condenser used in this commercial cabinet achieves multiple improvements in heat transfer efficiency, sealing reliability, ease of installation and maintenance, durability, and energy consumption optimization of the U-shaped long tube 2 through the synergistic design of high and low composite internal toothed rack and multi-stage sealed detachable connection.

[0058] Example 3: Please see Figures 13-14 The U-shaped long tube 2 is connected to the third elbow tube 7 via the connector 6. The end of the third elbow tube 7 has two symmetrical slots 701. The third elbow tube 7 has an annular groove 702 that communicates with the slots 701. The connector 6 has an I-shaped cross section. The lower ring plate of the connector 6 has a first tooth groove 603 and a second tooth groove 604 that are slidably connected to the first internal rack 201 and the second internal rack 202. The lower ring plate of the connector 6 has a locking protrusion 602 that is slidably connected to the annular groove 702 on the other side. The connector 6 has a T-shaped upper ring plate 601.

[0059] A first groove and a second groove are formed between the upper ring plate 601 and the lower ring plate. The pipe head of the U-shaped long pipe 2 is slidably connected to the groove wall of the first groove, and the pipe head of the third elbow pipe 7 is slidably connected to the groove wall of the second groove.

[0060] The difference between this embodiment three and embodiments one and two is that: after the connector 6 is slid into the annular groove 602 from the slot 701 via the snap 602, the disassembly and assembly base marks are made on the upper ring plate 601 and the third elbow tube 7 with a marker pen, and the tube head of the third elbow tube 7 is surrounded by the second notch; then, after aligning the connector 6 with the U-shaped long tube 2, the T-shaped upper ring plate 601 is rotated so that the first tooth groove 603 and the second tooth groove 604 of the lower ring plate rotate and mesh with the first inner toothed rack 201 and the second inner toothed rack 202 until the tube head of the U-shaped long tube 2 is surrounded by the first notch, thereby completing the quick and portable connection between the U-shaped long tube 2 and the third elbow tube 7 through the connector 6, and the setting of the T-shaped upper ring plate 601 effectively isolates and seals the mating part of the first notch and the second notch.

[0061] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0062] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A novel condenser for use in commercial cabinets, characterized in that, include: The outer shell (1) has multiple fins (101) arranged inside it. U-shaped long tubes (2), and multiple U-shaped long tubes (2) are arranged in an inclined and equally spaced array on the fins (101); Multiple U-shaped long pipes (2) are connected in an S-shaped pipeline through multiple first elbow pipes (3); The inner wall of the U-shaped tube (2) is provided with a plurality of first internal toothed racks (201), which are spirally distributed. A second internal rack (202) is provided between two adjacent first internal racks (201) of the U-shaped long tube (2), and the ratio of the rack height of the second internal rack (202) to the rack height of the first internal rack (201) is 1:

2.

2. The novel condenser for use in commercial cabinets according to claim 1, characterized in that, The U-shaped tube (2) and fins (101) are made of high-strength aluminum alloy, and the U-shaped tube (2) is coated with a corrosion-resistant coating.

3. The novel condenser for use in commercial cabinets according to claim 1, characterized in that, The U-shaped long tube (2) is connected to a third elbow tube (7) via a connector (6). The end of the third elbow tube (7) is symmetrically provided with two slots (701). The third elbow tube (7) is provided with an annular groove (702) communicating with the slots (701). The connector (6) has an I-shaped cross section. The lower ring plate of the connector (6) is provided with a first tooth groove (603) and a second tooth groove (604) that are slidably connected to the first internal rack (201) and the second internal rack (202). The lower ring plate of the connector (6) is provided with a locking protrusion (602) that is slidably connected to the annular groove (702). The connector (6) is provided with a T-shaped upper ring plate (601).

4. A novel condenser for use in commercial cabinets according to claim 3, characterized in that, The upper ring plate (601) and the lower ring plate form a first groove and a second groove. The head of the U-shaped long pipe (2) is slidably connected to the groove wall of the first groove, and the head of the third elbow pipe (7) is slidably connected to the groove wall of the second groove.

5. A novel condenser for use in commercial cabinets according to claim 1, characterized in that, Both ends of the U-shaped long tube (2) are formed with flared openings (203). The inner wall of the flared opening (203) is smooth. The U-shaped long tube (2) is detachably connected to a second elbow tube (4) through the flared opening (203). A connector (401) is provided on the second elbow tube (4). The connector (401) is provided with an external thread on its periphery. The connector (401) is connected to a connecting sleeve (5) through the external thread.

6. A novel condenser for use in commercial cabinets according to claim 5, characterized in that, The connector (401) is provided with an annular conical protrusion (402) that slides with the inner annular wall of the flared opening (203). The annular conical protrusion (402) and the outer edge of the connector (401) form an annular groove (403). The inner wall of the connector (401) is provided with a thickened part (404).

7. A novel condenser for use in commercial cabinets according to claim 6, characterized in that, The connecting part (501) of the connecting sleeve (5) is provided with an internal thread that is threaded to the connecting head (401). The inner wall cross section of the connecting sleeve (5) is L-shaped. The connecting sleeve (5) is provided with an annular inner conical wall (502) that is slidably connected to the flared end (203). The connecting sleeve (5) is provided with an annular inner wall (503) that is slidably connected to the outer wall of the U-shaped long tube (2). A step is formed between the annular inner conical wall (502) and the connecting part (501).

8. A novel condenser for use in commercial cabinets according to claim 7, characterized in that, The inclined inner wall of the flared opening (203) is connected to the outer wall of the annular conical protrusion (402) to form a first seal. The end of the flared opening (203) abuts against the groove wall of the annular groove (403) to form a second seal. The step of the connecting sleeve (5) abuts against the groove end of the annular groove (403) to form a third seal. The annular inner wall (503) of the connecting sleeve (5) and the outer wall of the U-shaped long tube (2) form a fourth seal. The internal thread of the connecting part (501) and the external thread of the connecting head (401) form a fifth seal.

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